Sash-fastener



(Model.) Y

TIYNKHAM- sAsH P'ASTENEB.. No. 293,820.v Patented-P61149, 1884.

m. yung UNiTi-ED STATES PATENT GFFICE.

SAMEL M. TINKHAM, 4OF TAUNTON, MASSACHUSETTS.

SASH- FASTEN ER.

SPECIFICATION forming part of Letters Patent No. 293,820, dated February 19, 1884. Application led September 17, 1883. (Model.)

T @ZZ whom it may concer/t: I.

Beit known that I, SAMUEL M. TINKHAM, of Taunton, in the county of `Bristol and State of Massachusetts, have invented. a new and useful Improvement in Sash Locks and Supporters, which will, in connection with the accompanying drawings, be hereinafter fully described, and speciiically defined in the appended claims.

This invention relates to that class ofsash locks and supporters which are attached to the meeting-rail of the lower sash and interlock vin the upper sash, and by which the upper sash, if unprovided with counterweights, may be supported at any desired height, and the two sash may be interlocked when either-partially or fully V,opened or when entirely closed, and when so partially opened and locked either sash may be closed without disturbance of the other and without manipulation of the lock, and it consists in the construction and combination of the divers devices embodied therein, aswill, in connection with the-accompanying drawings, be hereinafter fully described and claimed.

In said drawings, Figure 1 is a vertical section taken transversely to the plane of the sash, as on line X X, Fig. 2, through the side rail of the upper sash, the connecting ends 'of the top and meeting rails, the rack-plate, the sash-lock, Vand the upper portion of the lower sash on which the lock is secured. Fig. 2 is a sectional plan view, the section being taken as on line l/V IV, Fig. 1, and the plan showing the parts below the line. Fig. 3 is a plan view of the lock, the cap being shown as removed andturned upside down, the other parts being in position as assembled. Fig. 4 is a vertical section as on line S S, Fig. 3. Fig. 5 is a front'elevation of the rack-plate, taken as viewed from the right in Fig. 1.

In said views, A represents the windowframe. B is the side bar of the top sash, and

' C is the 4meeting-rail of the lower sash, which sash is shown in Figs. 1 and 2 as provided with the customary weights.

My improved sash-lock (shown in position inA Fig. 2) is formed with base-plate a, cap b, and angle-lever c, the lever being pivoted to a at d, and cap b being secured to a by the short screw e. This lock is secured to rail C by the wood-screwsf y, the former passing through ears formed coincidently on bed aand cap b, the better to secure the lock from either vertical or lateral displacement at the point of its engagement with the rack plate. The catch-lever c is forced outward, as shown in Figs. 2 and 3, by coiled spring h, (shown in its recess in Fig. 1 and by dotted lines in Fig. 2,) a stop, m, limiting the scope of its movement, and said lever is retracted by means of thumbpiece Z, which rises therefrom, the cap b being obliquely cut away in its front edge to admit such movement of the lever. The rack-plate j is formed of a strip of sheet metal, preferably brass, which, by being subjected to suitablyformed dies mounted in a press, has the inclines lc formed thereon by the shearing action of the dies, which separate said inclines at their end and edges from the-main body of the plate, and at the same time bend them to the serted in a seat cut in bar B, as shown in Figs. 1 and 2, and is secured by screws, as shown, a groove of the requisite depth being formed to receive the inclines, as shown in said figures.

When the two parts of the sash are arranged to close the window, they are locked in that position vby the lock and plate, as shown in Fig. 1, and if it is desired to raise the lower cis retractedto release its noseifrom the plate, when either sash may be moved the desired distance, when the catch will, by the action of the spring h, lock the two parts of the sash; and when either or both parts of the sash are partly or fully opened, either maybe partially or entirely closed bymerely exerting the requisite forcethereon, as the inclines k will severally throw back the catch as it enters the respective openings in plate j.

l I am aware that a great variety of sash-locks have been invented and patented which had for their object the interlocking of the'` two parts of the sash when either closed or parsome of these the catch engages in a deep seat cut in the sash from which it must be withdrawn by hand before the sash can be moved either up or down, while-with others a nelytoothed strip of metal is arranged to engage the pawl-like end-of a spring-actuated catch,

position shown in Fig. 1. This plate is in..

sash orto lower the upper one, or both, lever v tially or fully opened, and that in the use of IOO which is liable, when force is applied or the sash is moved rapidly, to be disengaged from such holding-teeth; but with my invention either Or both parts of the sash may be closed without regarding the catch7 as the inclincs k automatically move it out of the seats as the sash is being moved 'to close it. The rackplate j, being formed of sheet metal, is light and strong, and the nose i of the lever has a firm seat and hold therein, so that it cannot be disengaged7 except that it be disengaged by the hand before moving the sash. By arranging lever c between base a and cap b, itis iirmly supported and held in proper position when the weight of the upper sash or the force applied thereto is exerted upon it, and with the lever-actuating spring it constitutes piece, l, by which to retract it, all as specified. 3o

SAMUEL M. TINKHAM. \Vitnesses:

HENRY VILLLiMs, JOHN F. MONTGOMERY. 

